4/9 Current, Amp, and Resistance

We are given the task of producing light using batteries, a wire, and a light bulb. We determined that the way to light the bulb was to have the wire be at 1 positive and 1 negative end of the batteries. This way, the bulb can receive a current of charge that can be used to power the bulb. It does not matter if the wire goes from positive to negative or vice versa.

We are then asked to strengthen the light emitting from the light bulb using a second battery. The loop must go from positive to negative for there to be current so we stack the batteries so that both batteries can increase the amp in the current.

This is an electroscope we use to tell if an object has charge. If an object has charge, the two plates inside the box will move.

We came up with 2 ways to successfully light the bulb and 2 ways to incorrectly light the bulb using the battery, wire, and bulb.

We were asked what would happen if the positive side of the battery were to touch the electroscope and we predicted that nothing would happen. Our predictions were correct because in order for there to be charge, the circuit must be a closed loop.

We used a milliamp to observe if there was energy lost when the circuit lights a light bulb and when it doesn't. We observed that our milliamp returned the same number so there was no energy lost during the closed loop.

We were asked to come up with 4 things that are required to find the charge. We then used a formula consisting of all 4 variables and used it to calculate drift velocity given the cross-sectional area, number density, and the amps.

We performed an experiment in class to find the relationship between potential energy and current. We determined that their are proportional because their graphs are both linear.

We predicted the graphs we would yield from the experiment and were correct on thinking that the graphs were going to behave linearly.

We made a table to see the relationship between the length of a wire, the material used, and the diameter of the wire. We determined that all 3 variables contribute to the resistance of the wire.